2 files changed, 27 insertions, 2 deletions
diff --git a/include/nitro/SND_exChannel_shared.h b/include/nitro/SND_exChannel_shared.h
new file mode 100644
index 00000000..eb702f16
--- /dev/null
+++ b/include/nitro/SND_exChannel_shared.h
@@ -0,0 +1,25 @@
+#ifndef GUARD_SND_EXCHANNEL_SHARED_H
+#define GUARD_SND_EXCHANNEL_SHARED_H
+
+#include "nitro/types.h"
+
+#define SND_ENV_ATTACK 0
+#define SND_ENV_DECAY 1
+#define SND_ENV_SUSTAIN 2
+#define SND_ENV_RELEASE 3
+
+#define SND_CHN_TYPE_PCM 0
+#define SND_CHN_TYPE_PSG 1
+#define SND_CHN_TYPE_NOISE 2
+
+#define SND_CHN_SYNC_START 0x1
+#define SND_CHN_SYNC_STOP 0x2
+#define SND_CHN_SYNC_TIMER 0x4
+#define SND_CHN_SYNC_VOLUME 0x8
+#define SND_CHN_SYNC_PAN 0x10
+
+#define SND_LFO_PITCH 0
+#define SND_LFO_VOLUME 1
+#define SND_LFO_PAN 2
+
+#endif //GUARD_SND_EXCHANNEL_SHARED_H
diff --git a/include/nitro/SND_main_shared.h b/include/nitro/SND_main_shared.h
index d77273ed..154d93b6 100644
--- a/include/nitro/SND_main_shared.h
+++ b/include/nitro/SND_main_shared.h
@@ -83,7 +83,7 @@ struct SNDExChannel {
 
     union {
         const void *waveDataPtr;
-        u32 dutyCycle;
+        s32 dutyCycle;
     };                  // 0x44
 
     void (*callback)(struct SNDExChannel *chn, u32 status, void *userData); // 0x48
@@ -173,4 +173,4 @@ struct SNDTrack {
 };  // size = 0x40
  
  #endif //POKEDIAMOND_SND_MAIN_SHARED_H
- 
-\ No newline at end of file
+